Electronic-surveillance
noun
1.
surveillance or the gathering of information by surreptitious use of electronic devices, as in crime detection or espionage.
noun
1.
the use of such electronic devices as television monitors, video cameras, etc, to prevent burglary, shop lifting, break-ins, etc
2.
monitoring events, conversations, etc, at a distance by electronic means, esp by such covert means as wiretapping or bugging
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